Unvented Cylinder & Megaflo Systems
Do you want to have high pressure hot water coming from your taps and showers? Then you need to get an unvented cylinder
3 Simple Steps to Book Your Unvented Cylinder and Megaflo Services in London
- 1
Book Your Appointment
Use our easy online booking form to schedule a survey visit at your convenience.
- 2
Receive Your Quote
The unvented cylinder engineer will inspect the boiler, provide an estimate, and confirm the details.
- 3
Enjoy the Results
On the scheduled day, the engineer will perform the service, ensuring you enjoy a safe and efficient installation.
Unvented Cylinder & Megaflo Installation, Servicing, and Repair in London
At My Plumber, we specialise in unvented cylinder & Megaflo installation, servicing, and repair across London. Our expert, Gas Safe-certified engineers ensure your home enjoys consistent and high-pressure hot water, offering long-term solutions for your heating and hot water needs. Whether you need an unvented cylinder installed in a new build or require a repair on your existing Megaflo system, we have the experience to handle it all.
Common Unvented Cylinder Problems We Repair
Water Dripping from the Expansion Pipe
This issue is commonly caused by the expansion vessel pressure being too low or the water temperature being too high, which forces the water to expand and leak from the pipe. Our engineers will check and adjust the expansion vessel's pressure to restore the system's balance and prevent further leaks.
Leakages from the Combination Valve
A faulty or worn-out combination valve can lead to leaks, which may occur due to age, pressure issues, or scale buildup within the valve. We will inspect, repair, or replace the valve to ensure the cylinder is functioning properly and securely.
Low-Pressure Leaking Shower
Low pressure may be caused by a buildup of limescale or a problem with the cold water supply to the cylinder, affecting the shower's performance. Our engineers will diagnose the issue and provide a thorough cleaning of the cylinder and components to restore optimal water pressure.
Strange Noises from the Vessel
Gurgling or whistling noises typically indicate a buildup of air or limescale within the system, which prevents smooth water flow. We will remove airlocks, flush the system, and remove any scale to ensure the cylinder operates quietly and efficiently.
Clogged Inlets and Inconsistent Water Flow
Blockages in the inlets, often caused by debris or limescale, can disrupt water flow, leading to inconsistent hot water delivery. We will clean or replace the affected parts to restore proper flow and consistency in water temperature.
General Leaks and Corrosion
Leaks and corrosion can result from prolonged use, system wear, or improper installation, compromising the integrity of the unvented cylinder. Our skilled engineers will identify and replace any damaged parts, ensuring your system is safe and operational.
Limescale Damage
Hard water in areas like London often leads to limescale buildup, which can damage the internal components of the cylinder, affecting both efficiency and lifespan. We provide professional descaling services and preventative maintenance to protect your system from limescale-related issues.
Difficulties Setting and Maintaining the Right Temperature
A malfunctioning thermostat or faulty sensor may cause difficulties in maintaining the desired water temperature. Our engineers will inspect and repair the thermostat, ensuring your cylinder maintains the correct temperature efficiently.
Our Competitive Hourly Rates for Unventend Cylinder Services
Appointments 8am - 6pm Before/After Working Hours First Half Hour £67 £78 Subsequent Half Hours £54 £66 Day Rates £591 - Appointments 8am - 6pm First Half Hour £78 Subsequent Half Hours £66 Appointments Before/After Working Hours First Half Hour £84 Subsequent Half Hours £72
The minimum appointment time you can book is 1 hour, then we charge on an half hour basis. You always pay only for the actual time spent. If there is any shopping time and extra materials needed they come on top of the initial quote.
Unvented Hot Water Cylinder and Megaflo Installation Service in London
At My Plumber, we provide expert unvented hot water cylinders and Megaflo installation services throughout London, ensuring you have a consistent, high-pressure hot water supply in your home. Unvented systems are gaining popularity due to their ability to deliver high water pressure directly from the mains, offering reliable and efficient heating solutions for households of all sizes.
Unlike traditional systems with tanks, an unvented cylinder is connected directly to the mains water supply, allowing for higher pressure and improved water flow. This means that you get more consistent hot water throughout your home, making your shower experience, bath filling, and kitchen tasks much more efficient.
Moreover, unvented cylinders are quieter than traditional systems, eliminating the gurgling sounds often heard with older systems when water tanks refill slowly. Additionally, these systems reduce the risk of pipes freezing during colder months, as their water pipes are built into the loft.
At My Plumber, we offer installation, maintenance, and repair services for all types of unvented hot water cylinders, including Megaflo. Our engineers are equipped to install both direct electric immersion tanks and indirect gas-powered cylinders. If you're considering replacing your hot water system, it's important to consult with us first, as each home has unique needs. Our expert technician will visit your property to assess your requirements and recommend the best solution tailored to your specific needs.
Comprehensive Service and Maintenance for Your Unvented Hot Water Cylinder in London
At My Plumber, we offer expert servicing and maintenance of unvented hot water cylinders in London. Unvented cylinders are pressurised systems that need regular servicing to stay efficient and safe. Having a G3-certified engineer service your system annually helps maintain optimal performance, extend its lifespan, and prevent costly repairs. Our engineers conduct thorough inspections to identify potential issues early and ensure your heating system operates smoothly year-round.
Key service checks include:
Filter and Strainer Cleaning
We remove and clean any filters or strainers to ensure no debris or blockages affect your system's performance.
Cylinder Integrity Check
We thoroughly inspect the cylinder for leaks, corrosion, or any physical damage that could compromise its operation.
Air Charge Pressure
We check the air charge pressure in the expansion vessel and top it up if necessary, preventing expansion vessel failure and maintaining safe system operation.
Float-Operated Valve
We inspect and test the float-operated valve in the cistern to ensure proper operation.
Internal Expansion Facility
We inspect and adjust the expansion gap in the internal expansion facility to ensure proper functioning.
Temperature and Pressure Relief Valve Testing
We test the temperature/pressure relief valve to confirm it opens, closes, and reseals correctly, preventing dangerous pressure buildup.
Expansion Relief Valve Inspection
We check the expansion relief valve to ensure it opens, closes, and reseals as required.
Pressure Check
We perform a pressure test downstream of the limiting/reducing valve to verify the pressure is stable and within safe limits.
Flow Diffuser Cleaning
If your taps are fitted with flow diffusers, we clean them to ensure proper water flow and prevent clogging.
By providing thorough servicing and maintenance, we ensure that your unvented cylinder remains in optimal condition, delivering efficient, high-pressure hot water without interruption.
Unvented Hot Water Cylinder Repair in London
At My Plumber, we specialise in unvented hot water cylinder repairs and troubleshooting for homes across London. Unvented cylinders are complex systems that require expert attention when issues arise. If you suspect or discover that your unvented hot water cylinder is malfunctioning, don't hesitate to contact us. We offer fast and efficient repairs, ensuring minimal disruption to your home.
Common Unvented Cylinder Issues We Repair
Unvented hot water cylinders, including Megaflo systems, can face a variety of faults. My Plumber's engineers are equipped to handle all types of unvented cylinder repairs. Some of the common issues we fix include:
Malfunctioning Controls and Safety Devices
Controls and safety mechanisms that fail can disrupt the system's ability to operate safely. Our engineers will repair or replace faulty components as needed.
Faulty Thermostats
If your cylinder's thermostat isn't working, it can cause improper heating. We quickly fix or replace faulty thermostats to ensure accurate temperature regulation.
Loss of Power
If your unvented cylinder keeps tripping the circuit breaker, we'll investigate and fix any electrical issues causing power loss.
Failed Expansion Vessels
A broken expansion vessel can cause pressure issues, leading to system failure. We replace faulty expansion vessels to restore safe operation.
Faulty Expansion Valves
Expansion valves that aren't functioning can cause leaks and pressure buildup. We replace them quickly to ensure smooth operation.
Symptoms That Indicate Your Unvented Cylinder Needs Repair
If you're experiencing issues with your unvented hot water cylinder, look for these signs:
The boiler is on, but there's no hot water. This could indicate a failure in the heating element or thermostat.
Hot water only lasts for a few minutes. A malfunctioning thermostat, heating element, or a buildup of sediment in the tank could cause short-lived hot water.
Water Escapes Through a Tundish - A sign that the pressure relief valve is not functioning properly, resulting in overflow.
Water isn't heating up when the electric element is on - Indicates a potential failure in the electric immersion heater or thermostat.
Reasons to Choose Megaflow
Megaflow is the brand leader in unvented domestic water heating. An unvented cylinder can often provide a higher level of hot water than a combi boiler and can be an ideal solution for larger properties with multiple bathrooms. It's one of the most trusted names in the industry, offering a range of benefits that make it an excellent choice for many homeowners. Here are the top reasons why you should choose Megaflo for your home:
Brand Leader in Unvented Domestic Water Heating
Megaflo is a recognised brand leader in the unvented hot water cylinder industry. Known for its high quality and performance, Megaflo has set the standard for unvented cylinders. It provides reliable, efficient hot water at a steady pressure throughout your home, backed by years of industry expertise.
Ideal for Larger Properties with Multiple Bathrooms
For larger properties with multiple bathrooms, Megaflo is the perfect solution. Its capacity and powerful performance enable it to supply hot water to multiple outlets simultaneously, ensuring your home can enjoy hot water without interruptions, even during peak usage times.
Fast Filling of Baths
Megaflo systems are designed for fast filling of baths, providing you with hot water on demand without long waiting times. Whether you're filling a bath or running a shower, the Megaflo system ensures you can enjoy a comfortable, luxurious bath experience in less time.
More Powerful Showers
If you're tired of weak showers with inconsistent water pressure, Megaflo offers a significant improvement. With its unvented system, you'll enjoy more powerful and consistent water pressure, providing a superior shower experience. Ideal for large households with high hot water usage.
Flexible Installation Locations
One of the biggest advantages of a Megaflo system is its flexibility during installation. Unlike traditional systems that require specific installations, the Megaflo can be installed in various locations within your home, including loft spaces, airing cupboards, and even utility rooms, making it a highly versatile option.
Energy Efficient
Megaflo systems are designed to be energy efficient, helping you reduce heating costs while providing consistent hot water. Their insulation keeps the water temperature stable, reducing the need for constant reheating and ultimately lowering your energy bills, making them environmentally friendly.
Why Choose My Plumber for Your Unvented Cylinder Repairs in London?
Whether you need a new installation, a replacement system, or reliable maintenance, My Plumber is your go-to provider for unvented cylinder and Megaflo services in London.
Certified Engineers
Our team consists of Gas Sage and G3-certified professionals, ensuring your system is in safe hands. They have years of expertise in unvented cylinder repairs, installations, and servicing.
7-Day Service
We offer flexible appointments, including weekends and bank holidays, to suit your schedule.
Fully Insured & Guaranteed
All work comes with a 12-month guarantee on parts and labour for your peace of mind.
Transparent Pricing
We operate with no hidden charges, offering fair hourly rates.
Fast Response Times
We understand the urgency of losing hot water, so we offer same-day and next-day repair services.
Expert Installation
Our qualified engineers are experienced in fitting all types of unvented cylinders, including Megaflo, ensuring compliance with all safety regulations and manufacturer guidelines.
Comprehensive Repairs
If your unvented hot water cylinder is malfunctioning, we provide fast and reliable repair services to restore your system to full functionality. Whether it's a faulty expansion valve or malfunctioning thermostat, we can fix all types of issues with your unvented cylinder.
Ongoing Maintenance
To extend the lifespan of your unvented system and maintain optimal efficiency, we offer routine servicing and maintenance.
Frequently Asked Questions
Below are some frequently asked questions regarding Megaflow and Unvented Cylinders. If you require further information on Megaflow and Unvented Cylinders then please do not hesitate to get in touch.
What is an Unvented Cylinder or Megaflow System?
Megaflow is the leading brand of unvented cylinder. An unvented cylinder looks different to a normal cylinder. They are usually larger and white in colour (as opposed to bronze coloured). Also, you will need a specialist trained fitter to install them.
How much do Megaflow installations cost?
The cost of installing a Megaflow is different with every job. It depends on proximity to an external wall (for safety discharge outlet), proximity to electrics and size and location of the mains water pipe in the house. My Plumber will carry out a full survey to provide you with an estimate of how much the work will cost.
How much do Unvented Cylinder installation cost?
The cost of installing an Unvented Cylinder is different with every job. It depends on proximity to an external wall (for safety discharge outlet), proximity to electrics and size and location of the mains water pipe in the house. My Plumber will carry out a full survey to provide you with an estimate of how much the work will cost.
Where can an Unvented Cylinder be installed?
You can have your unvented cylinder or Megaflow fitted in most locations including: loft, garage, large airing cupboard or a basement.
Installation of an Unvented Cylinder or Megaflow system
Unvented hot water systems should only be installed and serviced by a qualified and competent person holding a current G3 Unvented Qualification. All our engineers who work on unvented systems hold this qualification. It is extremely important that the system is correctly installed, together with all essential safety controls. Building Regulations require all installations of unvented hot water cylinders to be notified to Building Control. My Plumber can take care of this for you when we install your unvented system.
Inlet Pressures for Unvented Cylinder or Megaflow systems operate?
Inlet pressures usually range from 1.5 bar to 3.5 bar. There is a safety mechanism fitted to ensure the maximum is not exceeded.
Does my Megaflow or Unvented System need to be serviced?
Yes, it is highly recommended that you have your Megaflow or unvented cylinder serviced annually. This typically involves cleaning filters, checking and testing the safety components, valves and thermostats. We also check the thermostat wiring and general performance of the overall system. For the annual service we currently charge £94 per hour, plus parts if required.
Is my mains water supply suitable?
It is really important that your mains water pressure, at peak times, is a minimum of 1.5 bar dynamic pressure, although all unvented systems will operate at pressures as low as 1 bar dynamic. The size of the incoming main ideally needs to be at least 25mm MDPE or 22mm copper, in order to provide adequate flow.
Can a Megaflo go in the loft?
It is possible to install a Megaflo in the loft, but there are a few things to think about. The loft must be well boarded out, have sufficient entrance and ventilation, and be sturdy enough to sustain the weight. Although it's not always the most practical place, it can be done properly with the correct setup.
What More Do We Offer in Terms of Heating Services
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By joining the Fantastic Club, you can not only make some significant savings on your plumbing and heating services with us but also book over 100 professional property maintenance services at promotional rates.
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